/* * f2fs debugging statistics * * Copyright (c) 2012 Samsung Electronics Co., Ltd. *             http://www.samsung.com/ * Copyright (c) 2012 Linux Foundation * Copyright (c) 2012 Greg Kroah-Hartman <gregkh@linuxfoundation.org> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include <linux/fs.h>#include <linux/backing-dev.h>#include <linux/f2fs_fs.h>#include <linux/blkdev.h>#include <linux/debugfs.h>#include <linux/seq_file.h> #include "f2fs.h"#include "node.h"#include "segment.h"#include "gc.h" static LIST_HEAD(f2fs_stat_list);static struct dentry *f2fs_debugfs_root;static DEFINE_MUTEX(f2fs_stat_mutex); static void update_general_status(struct f2fs_sb_info *sbi){	struct f2fs_stat_info *si = F2FS_STAT(sbi);	int i; 	/* validation check of the segment numbers */	si->hit_ext = sbi->read_hit_ext;	si->total_ext = sbi->total_hit_ext;	si->ext_tree = sbi->total_ext_tree;	si->ext_node = atomic_read(&sbi->total_ext_node);	si->ndirty_node = get_pages(sbi, F2FS_DIRTY_NODES);	si->ndirty_dent = get_pages(sbi, F2FS_DIRTY_DENTS);	si->ndirty_dirs = sbi->n_dirty_dirs;	si->ndirty_meta = get_pages(sbi, F2FS_DIRTY_META);	si->inmem_pages = get_pages(sbi, F2FS_INMEM_PAGES);	si->wb_pages = get_pages(sbi, F2FS_WRITEBACK);	si->total_count = (int)sbi->user_block_count / sbi->blocks_per_seg;	si->rsvd_segs = reserved_segments(sbi);	si->overp_segs = overprovision_segments(sbi);	si->valid_count = valid_user_blocks(sbi);	si->valid_node_count = valid_node_count(sbi);	si->valid_inode_count = valid_inode_count(sbi);	si->inline_inode = atomic_read(&sbi->inline_inode);	si->inline_dir = atomic_read(&sbi->inline_dir);	si->utilization = utilization(sbi); 	si->free_segs = free_segments(sbi);	si->free_secs = free_sections(sbi);	si->prefree_count = prefree_segments(sbi);	si->dirty_count = dirty_segments(sbi);	si->node_pages = NODE_MAPPING(sbi)->nrpages;	si->meta_pages = META_MAPPING(sbi)->nrpages;	si->nats = NM_I(sbi)->nat_cnt;	si->dirty_nats = NM_I(sbi)->dirty_nat_cnt;	si->sits = MAIN_SEGS(sbi);	si->dirty_sits = SIT_I(sbi)->dirty_sentries;	si->fnids = NM_I(sbi)->fcnt;	si->bg_gc = sbi->bg_gc;	si->util_free = (int)(free_user_blocks(sbi) >> sbi->log_blocks_per_seg)		* 100 / (int)(sbi->user_block_count >> sbi->log_blocks_per_seg)		/ 2;	si->util_valid = (int)(written_block_count(sbi) >>						sbi->log_blocks_per_seg)		* 100 / (int)(sbi->user_block_count >> sbi->log_blocks_per_seg)		/ 2;	si->util_invalid = 50 - si->util_free - si->util_valid;	for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_NODE; i++) {		struct curseg_info *curseg = CURSEG_I(sbi, i);		si->curseg[i] = curseg->segno;		si->cursec[i] = curseg->segno / sbi->segs_per_sec;		si->curzone[i] = si->cursec[i] / sbi->secs_per_zone;	} 	for (i = 0; i < 2; i++) {		si->segment_count[i] = sbi->segment_count[i];		si->block_count[i] = sbi->block_count[i];	} 	si->inplace_count = atomic_read(&sbi->inplace_count);} /* * This function calculates BDF of every segments */static void update_sit_info(struct f2fs_sb_info *sbi){	struct f2fs_stat_info *si = F2FS_STAT(sbi);	unsigned long long blks_per_sec, hblks_per_sec, total_vblocks;	unsigned long long bimodal, dist;	unsigned int segno, vblocks;	int ndirty = 0; 	bimodal = 0;	total_vblocks = 0;	blks_per_sec = sbi->segs_per_sec * (1 << sbi->log_blocks_per_seg);	hblks_per_sec = blks_per_sec / 2;	for (segno = 0; segno < MAIN_SEGS(sbi); segno += sbi->segs_per_sec) {		vblocks = get_valid_blocks(sbi, segno, sbi->segs_per_sec);		dist = abs(vblocks - hblks_per_sec);		bimodal += dist * dist; 		if (vblocks > 0 && vblocks < blks_per_sec) {			total_vblocks += vblocks;			ndirty++;		}	}	dist = div_u64(MAIN_SECS(sbi) * hblks_per_sec * hblks_per_sec, 100);	si->bimodal = div_u64(bimodal, dist);	if (si->dirty_count)		si->avg_vblocks = div_u64(total_vblocks, ndirty);	else		si->avg_vblocks = 0;} /* * This function calculates memory footprint. */static void update_mem_info(struct f2fs_sb_info *sbi){	struct f2fs_stat_info *si = F2FS_STAT(sbi);	unsigned npages;	int i; 	if (si->base_mem)		goto get_cache; 	si->base_mem = sizeof(struct f2fs_sb_info) + sbi->sb->s_blocksize;	si->base_mem += 2 * sizeof(struct f2fs_inode_info);	si->base_mem += sizeof(*sbi->ckpt); 	/* build sm */	si->base_mem += sizeof(struct f2fs_sm_info); 	/* build sit */	si->base_mem += sizeof(struct sit_info);	si->base_mem += MAIN_SEGS(sbi) * sizeof(struct seg_entry);	si->base_mem += f2fs_bitmap_size(MAIN_SEGS(sbi));	si->base_mem += 3 * SIT_VBLOCK_MAP_SIZE * MAIN_SEGS(sbi);	si->base_mem += SIT_VBLOCK_MAP_SIZE;	if (sbi->segs_per_sec > 1)		si->base_mem += MAIN_SECS(sbi) * sizeof(struct sec_entry);	si->base_mem += __bitmap_size(sbi, SIT_BITMAP); 	/* build free segmap */	si->base_mem += sizeof(struct free_segmap_info);	si->base_mem += f2fs_bitmap_size(MAIN_SEGS(sbi));	si->base_mem += f2fs_bitmap_size(MAIN_SECS(sbi)); 	/* build curseg */	si->base_mem += sizeof(struct curseg_info) * NR_CURSEG_TYPE;	si->base_mem += PAGE_CACHE_SIZE * NR_CURSEG_TYPE; 	/* build dirty segmap */	si->base_mem += sizeof(struct dirty_seglist_info);	si->base_mem += NR_DIRTY_TYPE * f2fs_bitmap_size(MAIN_SEGS(sbi));	si->base_mem += f2fs_bitmap_size(MAIN_SECS(sbi)); 	/* build nm */	si->base_mem += sizeof(struct f2fs_nm_info);	si->base_mem += __bitmap_size(sbi, NAT_BITMAP); get_cache:	si->cache_mem = 0; 	/* build gc */	if (sbi->gc_thread)		si->cache_mem += sizeof(struct f2fs_gc_kthread); 	/* build merge flush thread */	if (SM_I(sbi)->cmd_control_info)		si->cache_mem += sizeof(struct flush_cmd_control); 	/* free nids */	si->cache_mem += NM_I(sbi)->fcnt * sizeof(struct free_nid);	si->cache_mem += NM_I(sbi)->nat_cnt * sizeof(struct nat_entry);	si->cache_mem += NM_I(sbi)->dirty_nat_cnt *					sizeof(struct nat_entry_set);	si->cache_mem += si->inmem_pages * sizeof(struct inmem_pages);	si->cache_mem += sbi->n_dirty_dirs * sizeof(struct inode_entry);	for (i = 0; i <= UPDATE_INO; i++)		si->cache_mem += sbi->im[i].ino_num * sizeof(struct ino_entry);	si->cache_mem += sbi->total_ext_tree * sizeof(struct extent_tree);	si->cache_mem += atomic_read(&sbi->total_ext_node) *						sizeof(struct extent_node); 	si->page_mem = 0;	npages = NODE_MAPPING(sbi)->nrpages;	si->page_mem += npages << PAGE_CACHE_SHIFT;	npages = META_MAPPING(sbi)->nrpages;	si->page_mem += npages << PAGE_CACHE_SHIFT;} static int stat_show(struct seq_file *s, void *v){	struct f2fs_stat_info *si;	int i = 0;	int j; 	mutex_lock(&f2fs_stat_mutex);	list_for_each_entry(si, &f2fs_stat_list, stat_list) {		char devname[BDEVNAME_SIZE]; 		update_general_status(si->sbi); 		seq_printf(s, "\n=====[ partition info(%s). #%d ]=====\n",			bdevname(si->sbi->sb->s_bdev, devname), i++);		seq_printf(s, "[SB: 1] [CP: 2] [SIT: %d] [NAT: %d] ",			   si->sit_area_segs, si->nat_area_segs);		seq_printf(s, "[SSA: %d] [MAIN: %d",			   si->ssa_area_segs, si->main_area_segs);		seq_printf(s, "(OverProv:%d Resv:%d)]\n\n",			   si->overp_segs, si->rsvd_segs);		seq_printf(s, "Utilization: %d%% (%d valid blocks)\n",			   si->utilization, si->valid_count);		seq_printf(s, "  - Node: %u (Inode: %u, ",			   si->valid_node_count, si->valid_inode_count);		seq_printf(s, "Other: %u)\n  - Data: %u\n",			   si->valid_node_count - si->valid_inode_count,			   si->valid_count - si->valid_node_count);		seq_printf(s, "  - Inline_data Inode: %u\n",			   si->inline_inode);		seq_printf(s, "  - Inline_dentry Inode: %u\n",			   si->inline_dir);		seq_printf(s, "\nMain area: %d segs, %d secs %d zones\n",			   si->main_area_segs, si->main_area_sections,			   si->main_area_zones);		seq_printf(s, "  - COLD  data: %d, %d, %d\n",			   si->curseg[CURSEG_COLD_DATA],			   si->cursec[CURSEG_COLD_DATA],			   si->curzone[CURSEG_COLD_DATA]);		seq_printf(s, "  - WARM  data: %d, %d, %d\n",			   si->curseg[CURSEG_WARM_DATA],			   si->cursec[CURSEG_WARM_DATA],			   si->curzone[CURSEG_WARM_DATA]);		seq_printf(s, "  - HOT   data: %d, %d, %d\n",			   si->curseg[CURSEG_HOT_DATA],			   si->cursec[CURSEG_HOT_DATA],			   si->curzone[CURSEG_HOT_DATA]);		seq_printf(s, "  - Dir   dnode: %d, %d, %d\n",			   si->curseg[CURSEG_HOT_NODE],			   si->cursec[CURSEG_HOT_NODE],			   si->curzone[CURSEG_HOT_NODE]);		seq_printf(s, "  - File   dnode: %d, %d, %d\n",			   si->curseg[CURSEG_WARM_NODE],			   si->cursec[CURSEG_WARM_NODE],			   si->curzone[CURSEG_WARM_NODE]);		seq_printf(s, "  - Indir nodes: %d, %d, %d\n",			   si->curseg[CURSEG_COLD_NODE],			   si->cursec[CURSEG_COLD_NODE],			   si->curzone[CURSEG_COLD_NODE]);		seq_printf(s, "\n  - Valid: %d\n  - Dirty: %d\n",			   si->main_area_segs - si->dirty_count -			   si->prefree_count - si->free_segs,			   si->dirty_count);		seq_printf(s, "  - Prefree: %d\n  - Free: %d (%d)\n\n",			   si->prefree_count, si->free_segs, si->free_secs);		seq_printf(s, "CP calls: %d\n", si->cp_count);		seq_printf(s, "GC calls: %d (BG: %d)\n",			   si->call_count, si->bg_gc);		seq_printf(s, "  - data segments : %d (%d)\n",				si->data_segs, si->bg_data_segs);		seq_printf(s, "  - node segments : %d (%d)\n",				si->node_segs, si->bg_node_segs);		seq_printf(s, "Try to move %d blocks (BG: %d)\n", si->tot_blks,				si->bg_data_blks + si->bg_node_blks);		seq_printf(s, "  - data blocks : %d (%d)\n", si->data_blks,				si->bg_data_blks);		seq_printf(s, "  - node blocks : %d (%d)\n", si->node_blks,				si->bg_node_blks);		seq_printf(s, "\nExtent Hit Ratio: %d / %d\n",			   si->hit_ext, si->total_ext);		seq_printf(s, "\nExtent Tree Count: %d\n", si->ext_tree);		seq_printf(s, "\nExtent Node Count: %d\n", si->ext_node);		seq_puts(s, "\nBalancing F2FS Async:\n");		seq_printf(s, "  - inmem: %4d, wb: %4d\n",			   si->inmem_pages, si->wb_pages);		seq_printf(s, "  - nodes: %4d in %4d\n",			   si->ndirty_node, si->node_pages);		seq_printf(s, "  - dents: %4d in dirs:%4d\n",			   si->ndirty_dent, si->ndirty_dirs);		seq_printf(s, "  - meta: %4d in %4d\n",			   si->ndirty_meta, si->meta_pages);		seq_printf(s, "  - NATs: %9d/%9d\n  - SITs: %9d/%9d\n",			   si->dirty_nats, si->nats, si->dirty_sits, si->sits);		seq_printf(s, "  - free_nids: %9d\n",			   si->fnids);		seq_puts(s, "\nDistribution of User Blocks:");		seq_puts(s, " [ valid | invalid | free ]\n");		seq_puts(s, "  ["); 		for (j = 0; j < si->util_valid; j++)			seq_putc(s, '-');		seq_putc(s, '|'); 		for (j = 0; j < si->util_invalid; j++)			seq_putc(s, '-');		seq_putc(s, '|'); 		for (j = 0; j < si->util_free; j++)			seq_putc(s, '-');		seq_puts(s, "]\n\n");		seq_printf(s, "IPU: %u blocks\n", si->inplace_count);		seq_printf(s, "SSR: %u blocks in %u segments\n",			   si->block_count[SSR], si->segment_count[SSR]);		seq_printf(s, "LFS: %u blocks in %u segments\n",			   si->block_count[LFS], si->segment_count[LFS]); 		/* segment usage info */		update_sit_info(si->sbi);		seq_printf(s, "\nBDF: %u, avg. vblocks: %u\n",			   si->bimodal, si->avg_vblocks); 		/* memory footprint */		update_mem_info(si->sbi);		seq_printf(s, "\nMemory: %u KB\n",			(si->base_mem + si->cache_mem + si->page_mem) >> 10);		seq_printf(s, "  - static: %u KB\n",				si->base_mem >> 10);		seq_printf(s, "  - cached: %u KB\n",				si->cache_mem >> 10);		seq_printf(s, "  - paged : %u KB\n",				si->page_mem >> 10);	}	mutex_unlock(&f2fs_stat_mutex);	return 0;} static int stat_open(struct inode *inode, struct file *file){	return single_open(file, stat_show, inode->i_private);} static const struct file_operations stat_fops = {	.open = stat_open,	.read = seq_read,	.llseek = seq_lseek,	.release = single_release,}; int f2fs_build_stats(struct f2fs_sb_info *sbi){	struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);	struct f2fs_stat_info *si; 	si = kzalloc(sizeof(struct f2fs_stat_info), GFP_KERNEL);	if (!si)		return -ENOMEM; 	si->all_area_segs = le32_to_cpu(raw_super->segment_count);	si->sit_area_segs = le32_to_cpu(raw_super->segment_count_sit);	si->nat_area_segs = le32_to_cpu(raw_super->segment_count_nat);	si->ssa_area_segs = le32_to_cpu(raw_super->segment_count_ssa);	si->main_area_segs = le32_to_cpu(raw_super->segment_count_main);	si->main_area_sections = le32_to_cpu(raw_super->section_count);	si->main_area_zones = si->main_area_sections /				le32_to_cpu(raw_super->secs_per_zone);	si->sbi = sbi;	sbi->stat_info = si; 	atomic_set(&sbi->inline_inode, 0);	atomic_set(&sbi->inline_dir, 0);	atomic_set(&sbi->inplace_count, 0); 	mutex_lock(&f2fs_stat_mutex);	list_add_tail(&si->stat_list, &f2fs_stat_list);	mutex_unlock(&f2fs_stat_mutex); 	return 0;} void f2fs_destroy_stats(struct f2fs_sb_info *sbi){	struct f2fs_stat_info *si = F2FS_STAT(sbi); 	mutex_lock(&f2fs_stat_mutex);	list_del(&si->stat_list);	mutex_unlock(&f2fs_stat_mutex); 	kfree(si);} void __init f2fs_create_root_stats(void){	struct dentry *file; 	f2fs_debugfs_root = debugfs_create_dir("f2fs", NULL);	if (!f2fs_debugfs_root)		return; 	file = debugfs_create_file("status", S_IRUGO, f2fs_debugfs_root,			NULL, &stat_fops);	if (!file) {		debugfs_remove(f2fs_debugfs_root);		f2fs_debugfs_root = NULL;	}} void f2fs_destroy_root_stats(void){	if (!f2fs_debugfs_root)		return; 	debugfs_remove_recursive(f2fs_debugfs_root);	f2fs_debugfs_root = NULL;}